Steam pile-driver



2 Sheets-Sheet 1.

K I U P U D I A m d o M o m STEAM PILE DRIVER.

No. 341,837. Patented May 11, 1886.

WITNESSES INVEW'TOR .Httorney (No Model.) 2 Sheets-Sheet 2.

A. J. DUPUIS.

STEAM PILE DRIVER. No. 341,837. Patented May 11, 1886.

Attorney ill PATENT rricn.

AUGUSTUS J. DUPUIS, OF DETROIT, MICHIGAN.

STEAM PlLE-DRIVER.

SPECIFICATION forming part of Letters Patent No. 341,837, dated lltiay1]., 5886.

Application tiled October 26, 1885. Serial No. 181,037.

To all whom it may concern.-

Be it known that I, AUGUSTUS J. DUPUIs, of Detroit, county of WVayne,State of Michigan, have invented a new and useful Inr provement in SteamPile-Drivers; and I de clare the following to be a full, clear, andexact description of the same, such as willenable others skilled in theart to which it pertains to make and use it, reference being had to theaccompanying drawings, which form a part of this specilieation.

My invention consists of the combinations of devices and applianceshereinafter specified, and more particularly pointed out in the claims.

In the drawings,Figure 1 is a sectional View, and Fig. 2 a sideelevation at right angles to Fig. 1, of a device embodying myinvention.Fig. 3 is a horizontal section through the cylinder, and Fig. i asection just above the lat ter.

My invention consists in the several novel features of construction andcombination of parts,hereinal'ter fully described,and definitely pointedout in the claims annexed to this specification.

In carrying out my invention, A represents the portion which rests uponand surrounds the hcadof the pile, which I term the ferrule.

B is the steam-cylinder.

B are uprights connecting the ferrule with the cylinder.

C is the plunger, formed at G into a pistonhead adapted to travel withinthecylinder.

D is a steanrchest; E, a rotary valve within thesteanrchest.

e c are steam-portsleading to opposite ends of the cylinder.

6- is the exhaust-port, open to the external air at e", or otherconvenient point, as shown in Fig. 3. A valve, E, (shown in Fig. 1,)isprovided with a bridge of any usual form adapted to span over theexhaust-port and either of said stcanrports alternately, so that when inthe position shown in the drawings steam may enter beneath the piston ofthe plunger and be exhausted from the space above the piston, and whenthe valve is rotated downward it will out off steam from beneath thepiston and connect this port with the exhaust, at the same timeadmitting live (No model.)

steam above the piston. The valve E is provided with two crank-arms, EE, as shown in Figs. 1 and 2, whereby the valve is rotated.

F is a valveshifting bar, provided at its upper and lower ends withcam-shaped projections ff. This bar is connected so as to move up anddown with the piston, and it is apparent upon inspection of Fig. 1 thatwhen the piston is raised from the position shown the valve E willremain in the position indi cated until the cam f impinges against thecrank arm E. It will then operate to rotate the valve over to the rightand change the relation of the ports, as' above explained, and on thedownward motion of theplunger the valve will remain in this positionuntil the cam f" strikes the other crank-arm, Eflwhich will rotate thevalve back to the position shown in the drawings.

The uprights B are provided with up wardly-projceting flanges 13*, whichengage with suitable ways upon the usual frame-work, (not shown, butemployed with all pile-driving devices for locating the uprights overthe pile and driving it in order that it may fall down as the pile isdriven.)

F is a collar formed in two pieces, so as to be fitted around and withinthe corresponding annular groove in the plunger. They are held togetherin place by an outer tightening-band, F This may be secured in anysuitable way, although I havel'ounditconvcnient to slightly taper thecollar F, and also the tighteningband, and then to simply drive thelatter and cause it to wedge upon the collir. An arm, F, projectsf r omthe tightening-band, to which arm the valve-shifting bar F is connected.This tightening band is also provided with projections f, which engagesuitable guides, j",upon the uprights B,in order to give direc tion tothe extremity of the plunger, and to prevent any rotation of the plungerfrom disturbing the proper position of the valve-shifting bar F.

The operation of the device is as follows: The apparatus is connected bythe lifting-ring H to suitable hoisting mechanism, and is hoisted to itsproper position over the pile that is to be driven. It is then lowereddown between its guides until the ferrule rests upon the top of thepile, the pile being usually dressed off so as to enter the cavity inthe ferrule. Steam is now admitted through a suitable steam-hose intothe steam-chest. The valve being in the position shown in Fig. 1, steamenters thence to the space beneath the piston and lifts the plungerquickly upward to its the full steam-pressure, and so delivers a blowvery greatly in excess of the blow that would have beendelivered by theplunger alone. As soon as the plunger reaches the bottom of itstraveland delivers its stroke, the projection f on the bar F will have shiftedthe valve,

causing the cylinder to again take steam beneath the piston and exhaustfrom above the piston. The device therefore works rapidly in deliveringits blow until steam is turned ofi' from the steam-hose, each timeadding the power ofthe steam in delivering the blow to the gravity ofthe plunger itself.

I have described a rotary valve in this connection. It is apparent,however, that any suitable valve mechanism may be employed instead of arotary valve, and I have also describedthevalve-shifter bar connecteddirectly with the plunger, as a means for shifting the valve and causingit to change the relation of the ports. It is apparent, however, thatany other suitable valve-shifting mechanism might be employed, althoughI prefer such mechanism as shall have motion imparted 'to it by theplunger, either directly or indirectly, and would therefore have itunderstood that my invention contemplates such modifications as I havesuggested.

- The piston and plunger are preferably made ina single piece integralwith each other.

This prevents all liability tobreakage or de rangement, such as wouldexist if the piston were made separable from the plunger.

What I claim is 1. Asteam pile-driver provided with steamports leadingto both ends of the cylinder, and an exhaust communicating with bothsteamports, a valve-chamber, a rotary valve within the same, a doublecrank on the stem of the valve, and a side bar operated by the plunger,

-and having cams which actuate said cranks,

substantially as described.

2. A steam pile-driver having a rotary valve, a double crank on the stemof said valve, a slide bar having cams which actuate said cranks, and acollar connecting said slide-bar to the plunger, the parts beingcombined substantially as described.

3. A. steam pile-driver having a rotary valve, a double crank mounted onthe stemof the valve, a slide-bar actuatingsaid crank, a collarconnecting said bar to the plunger, and projections on the collarengaging with guides on the uprights, substantially as described.

4. In a steam pile-driver, thecombination, with a rotary valve and aslide-bar operating said valve, ofa collar connectingsaid bar with theplunger, and asecond two-partcollar fitted within a recess in theplunger and embraced by the outer collar, substantial] y as described.

5. In a steam pile-driver, the'combination, with the steam-cylinder anda ferrule for supporting the head of the pile, ofuprights con- Inect-ing the two guides upon said-uprights, a collar having projectionsengaging with said guides, a plunger carrying the collar, a slidebarconnected with the latter, and a rotary valve operated by cams on saidrod, substantially as described.

In testimony whereof Isign this specification in the presence of twowitnesses.

AUGUSTUS J. DUPUIS.

Witnesses:

N. S. WRIGHT, M. B. ODoGHER'rY. a

